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How to clean a concrete walkway Walter R. 03-05-2008
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Posted by Walter R. on March 5, 2008, 4:06 pm
The 4' wide concrete walkway to my front door has become stained and
unsightly. Part algae, part burn marks from burning palm seeds dropping on
it, part just a discoloration of unknown origin.

If I use Clorox bleach on the concrete, that would be as starting point to
clean it up. My question is, will chlorine harm the concrete?

--
Walter
www.rationality.net
-



Posted by Oren on March 5, 2008, 4:15 pm
wrote:

>The 4' wide concrete walkway to my front door has become stained and
>unsightly. Part algae, part burn marks from burning palm seeds dropping on
>it, part just a discoloration of unknown origin.
>
>If I use Clorox bleach on the concrete, that would be as starting point to
>clean it up. My question is, will chlorine harm the concrete?

No. You also, won't get the burn marks out, sorry.

Remember to not track bleach back into the house and the new carpet.


Posted by dadiOH on March 5, 2008, 4:35 pm
Oren wrote:
> wrote:
>
>> The 4' wide concrete walkway to my front door has become stained
>> and unsightly. Part algae, part burn marks from burning palm seeds
>> dropping on it, part just a discoloration of unknown origin.
>>
>> If I use Clorox bleach on the concrete, that would be as starting
>> point to clean it up. My question is, will chlorine harm the
>> concrete?
>
> No. You also, won't get the burn marks out, sorry.
>
> Remember to not track bleach back into the house and the new carpet.

Dang, you just killed a (possible) new thread :)

--

dadiOH
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Posted by Walter R. on March 5, 2008, 10:48 pm
What will it take to get the burn marks out? Sandblasting??

Thanks

--
Walter
www.rationality.net
-
> wrote:
>
>>The 4' wide concrete walkway to my front door has become stained and
>>unsightly. Part algae, part burn marks from burning palm seeds dropping on
>>it, part just a discoloration of unknown origin.
>>
>>If I use Clorox bleach on the concrete, that would be as starting point to
>>clean it up. My question is, will chlorine harm the concrete?
>
> No. You also, won't get the burn marks out, sorry.
>
> Remember to not track bleach back into the house and the new carpet.
>



Posted by Oren on March 6, 2008, 2:01 pm
wrote:

>What will it take to get the burn marks out? Sandblasting??
>
>Thanks

We don't know how deep and severe they are. It will etch the surface
like the pressure washer. There are various blast media that are less
abrasive. A local could help with the answer.

Perhaps an acid etch and stain would be the less costly approach.

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